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State & Local Tax (SALT) Optimization
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State & Local Tax (SALT) Optimization

Management of multi-state nexus, sales tax compliance, and pass-through entity tax (PTET) elections.

State & Local Tax (SALT) Optimization

PTET

Capital Allocation

Nexus is the most misunderstood part of a tax strategy. Remote employees, a revenue threshold, or a third-party warehouse can all trigger filing requirements in states where you have no office. That hidden non-compliance can lead to large assessments for unfiled sales and income tax.

Our SALT practice audits your jurisdictional footprint. We identify the Wayfair triggers in your revenue streams and implement state-specific workarounds, such as PTET elections, that let business owners get around federal deduction caps and keep more money in the business.

Our Methodology

How we deliver this service.

A rigorous, phase-driven process ensures nothing is missed and every position is defensible.

01

Nexus Footprint Audit

We review your physical and economic presence across all 50 states to identify economic nexus and filing obligations you may have missed.

02

Apportionment Modeling

We model your state-by-state income apportionment (market-based vs. cost-of-performance) to find the lowest taxable base available.

03

Sales & Use Tax Review

Our team reviews your product/service taxability across states and audits your exemption certificate management (ECM) protocols.

04

SALT Cap Workarounds

We identify and implement Pass-Through Entity Tax (PTET) elections, allowing state tax to be deducted at the entity level.

05

Voluntary Disclosure (VDA)

For historical omissions, we negotiate Voluntary Disclosure Agreements with state authorities to eliminate penalties and close previous years.

06

Multi-State Compliance

We handle the annual filing of state income, franchise, and sales tax returns and keep you on top of every jurisdictional deadline.

What counts as presence in a state now.

Nexus Strategy

Economic Nexus & Wayfair

What counts as presence in a state now.

Since the Wayfair decision, physical presence is no longer the test for state tax liability. Economic nexus, usually $100k in sales or 200 transactions, now triggers sales tax obligations in nearly every state. If you run a digital service or e-commerce business, you probably have quiet obligations in dozens of states.

We audit your revenue to identify exactly where you have triggered nexus, register you with the appropriate state authorities, and set up automated sales tax collection so you stay compliant without adding work for your team.

Nexus focus: Wayfair $100k/200-transaction testing, marketplace facilitator rules, and remote-work 'physical nexus' audits.

Getting around the federal $10,000 SALT deduction cap.

PTET Optimization

PTET & SALT Cap Workarounds

Getting around the federal $10,000 SALT deduction cap.

The federal TCJA capped individual state and local tax deductions at $10,000, which hits taxpayers in high-tax states hard. In response, dozens of states enacted Pass-Through Entity Tax (PTET) regimes. These allow S corporations and partnerships to pay the state tax at the entity level, where it is fully deductible against federal income.

We model your PTET benefit across all applicable states (e.g., CA, NY, IL). The election turns a non-deductible personal expense into a business-level deduction, which can be worth thousands every year.

Optimization focus: State PTET election modeling, K-1 credit reconciliations (Section 199A), and high-tax state residency audits.

Cleaning up historical omissions.

Historical Compliance

Voluntary Disclosure (VDA)

Cleaning up historical omissions.

Discovering unfiled tax in another state can derail venture funding or an M&A deal. Rather than waiting for a state audit, we use Voluntary Disclosure Agreements (VDA). Under a VDA, a state agrees to waive penalties and limit the look-back period in exchange for your voluntary registration.

We gather the historical data and negotiate with the state revenue departments so your state tax history is clean. That protects your legal entity in future due diligence and removes the risk of unexpected levies.

Resolution focus: Multistate VDA negotiation, look-back period limitation, statutory penalty abatement, and state-level audit defense.

Operating in multiple states?

The SALT cap and economic nexus both cost you money. Get a state-level strategy that restores your deductions and keeps your filings in order.

What You Receive

Specific deliverables, precisely documented.

“State tax is a quiet drag on capital. We document your multistate presence and manage it deliberately.”

Multi-State Nexus Study

A technical report mapping your physical and economic presence in all 50 states to identify filing requirements.

PTET Election Filings

Preparation of annual Pass-Through Entity Tax elections to get around the $10,000 federal SALT cap.

State Income Tax Preparation

Preparation of all state individual and business returns, including local gross receipts filings.

Sales & Use Tax Registration

Registration in each state where a Wayfair nexus review shows you need to collect.

VDA Negotiation Packages

Petitions for Voluntary Disclosure Agreements that eliminate state-level penalties.

Apportionment Worksheets

Modeling of market-based sourcing to keep the state-level tax base as low as the rules allow.

Interstate Basis Tracking

Maintenance of state-specific S-Corp and Partnership basis records (where they differ from Federal basis).

Local Gross Receipts Filing

Preparation for specialized local taxes such as San Francisco Gross Receipts, WA B&O, and NYC UBT.

Common Questions

Technical clarifications.

Answers to the most frequently asked questions about how this service works in practice.

Likely yes, if you have over $690,000 in sales to CA residents (economic nexus) or a remote employee there. California enforces 'deemed nexus' more actively than almost any other state.

It lets you pay your state tax through your business. The state tax then becomes 100% deductible for federal purposes, which gets you past the $10,000 SALT deduction limit on your personal return.

No. The thresholds vary by state and by tax type. We test the thresholds separately for every state so you aren't over-filing or under-filing.

Most states now tax software-as-a-service (SaaS). We help you integrate tax collection tools into your billing system (Stripe, etc.) so the correct rate is applied automatically based on the user's zip code.

From a tax perspective, yes. Many states use a 183-day rule or domicile tests, and if this isn't managed carefully, both states can tax all of your income. We run the residency review needed to prevent double tax.

Contact US/UK Cross Border Tax

Two Tax Systems, One Team

London Headquarters

4 Crown Place
London EC2A 4BT
United Kingdom

Manchester

CORE
Brown St, Manchester M2 1DH
United Kingdom

San Francisco

600 California St
San Francisco, CA 94108
United States

New York

33 Irving Pl
New York, NY 10003
United States

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